whelan



(No Modem Y 3 sheets-sheet 1,

R. WHELAN.

STEAM BOILER PUBNAGE. l' No. 375.905. Patented ,In. 3, 1888.

(No Model.) Y 3 sheets-sheen 2; R. WHELAN.

STEAM BoILBR PURNAGE. l No; 815,905. Patented J8@l 8,V 1888.

(No Model.)

` 3 sheets-sheen 3.. R. WHBLAN. STEAM `BOILER PURNACB.

Patented Jan.- 3

vom

UNITED STATES PATENT OFFICE.

`ROBERT VVHELAN, OF CHICAGO, ILLINOIS, ASSIGNOB OF ONEHALF TO ROBERT A.WHELAN, OF SAME PLACE.

STEAM-BOILER FURNACE.

SPECIFICATION forming part of Letters Patent No. 375,905, datedJanuary3, 1288.

Application filed May 3, 1F87. Serial No. 236,991.

Z' 0 @ZZ whom t may concern:

Beit known that I, ROBERT WHELAN, of Chicago, in the county of Cool; andState of Illinois, have invented certain new and useful Improvements inSteam Boiler Furnaces, of which the following is a specification.

My invention relates to gas'consuming furnaces,and is designed as animprovement upon that for which Letters PatentNo. 341,196 were issued tome May 4, 1886.

The invention is designed particularly to be applied to furnaces whichhave shaking-grates; but I wish it understood that I do not limit myselftoa furnace having such a grate, as it is apparent that various featuresof the invention can be applied whether the grate be astationary orshaking one.

Briefly stated, the invention consists in a novel means of feeding airand steam to the furnace, whereby the gases are consumed and the draftincreased.

In the accompanying drawings, Figure 1 is aperspectiveview ofa portionof myimproved furnace with parts broken away to show the interior. Fig.2 is a front end view,with thev grate and furnacefront removed. Fig. 3is a perspective view of a portion of the grate. Fig. 4 is alongitudinal central sectional view through the grate and bridge-wall.Fig. 5 is a vertical transverse sectional view of one of the grate bars;and Figs. 6, 7,. and 8, views illustrating certain details, hereinafterreferred to.

In the drawings, A indicates a boiler; B, the masonry or wall of thefurnace supporting the same; C, the grate proper; D, the furnacefront,and E the bridge-wall, said parts being arranged in substantially thesame manner as in my former patent hereinbefore referred to.

Within the bridge-wall I place a metallic L- shaped box or chamber, F,(shown in Figs. l and 4,) said box being provided on its front face withelongated openings a in the upright portion, and with cylindrical holesor openings b in the front face of the horizontal por tion.

As shown in Figs. 1 and 4, the openings a are continued outward throughthe bridge- Y wall, so as to deliver the air or steam outward toward thefront of the furnace direct-ly over (No model.)

and upon the mass of fuel upon the grale,while the circular openings I;`are adapted to receive the cylindrical ends c of the gratebars G. Thesegrate-bars are of the form shown in Figs. 1, 8, 4, and 5, and it will benoticed that they are hollow from end to end, so as to form a channel orpassage for the steam or air to the chamber in the bridge-wall.

The grate-bars G are 'each provided with a series of transverse ribs,(Land are further provided with a zigzag or irregular edge, as shown inFigs. land 3. The adjacent edges of the bars G are provided with astrip, u, which is cast integral with the bars, and connects the ends ofthe ribs d, thereby serving to strengthen the bars. Of course thegratebars adjacent to the side walls of the furnace have only one-oftheir sides made in this form, so as to prevent the escape of materialalong the outer edge of the grate. The central passage or chamber, e,extending throughout the length of the grate-bars, is provided withlateral passages or openingsf, as shown in Figs. 4 and 5, which openingsextend upwardly to about on line with the base of the ribs dand areadapted to discharge heated air or steam directly and among the burningfuel.

At the front end the grate-bars are formed with a cylindrical neck, g,and also with a bulb or enlargement, h. (Shown in Figs. 1, 3, 4, and 8.)Upon reference to Figs. 1, 3, 4, and S. it will be noticed that thisbulb or enlargement is perforated to receive in its end asmall pipe, t',which latter is in turn connected with a larger pipe, j, which extendsacross the furnace-front beneath the dead-plate. In the bulb orenlargement h are formed openings or perforations twhich, when steam isdischarged through the nozzle 1'., permit air to enter said bulb and bedischarged with thev steam into the grate-bar.

Steam or heated air is supplied to pipejA from a pipe, 7c, (shown inFigs. 1 and 4,) said pipe projecting through the furnace-front andconveying steam or air from any suitable source to the pipej, as shown.Of course the pipe 7c will be provided with suitable valves, as in myformer patent; ,but as they form no part of my invention they are notshown herein.

ffl

. bridgewall.

Each of the Vgrate-bars is provided with a depending lug, l, and onehalt` of the gratebars have their lugs connected by a bar, m, and theother half have their lugs connected by a similar bar, so that each halfof the grate may be shaken as desired.

II indicates the dead-plate, which is secured in position in anysuitable manner, said plate being provided on its under side withsemicircular collars a, which encircle the tubular neck g of thegrate-bars and form'bearings or supports for said bars. Near the middleof the dead-plate there are two of these collars or bearings a, in whichis journaled a shakerrod, I, as shown in Fig. 3, the inner end of saidrod being connected to one end of bar or rod m, while its other endprojects outward through the furnace-front and is adapted to receive ashaker or wrench, 'as shown in Figs. l and 3. From this construction ofthe grate it will be seen that either half of the grate may be shakenindependently of the other halt", and this, too, without in any manneraffecting the conveying of steam or air to the rlhe middle grate -barwill, by preference, be made stationary, but this is not essential. Thenumber of bars in the grate may be varied as desired, and the number ofgratebars to be operated by each shaker-rod I is also a matter capableof variation.

rIhe dead-plate I-I is provided with a series of slots or perforat-ions,o, immediately in front of the furnace-doors, as shown in Fig. l, and toeach side ofthe door are similar perforations, upon and over which thelining shown in Fig. 6 sets. The liner may be made of iron, fireclay, orhollow tiling,and is formed with a longitudinal chamber or passage.p,and with a series of lateral openings, q. NVhen in position, thepassage or chamber-p rests directly over one of the openings in the deadplate, and consequently t-he air from beneath the grate may pass upward,through the deadplate and through the liner and be discharged throughthe lateral openings q at the front edge of the grate proper. 4.

Upon reference to Fig. 7, it will be seen that the curved or archedliner is likewise provided with a series of lateral openings,`q, throughwhich air is discharged the same as from the upright side liners.

Projecting through the side walls of the furnace, as shown in Figs. land2, are small jets or nozzles, r, which are adapted to dischargeheated air upon the burning fuel, and projecting through the front ofthe furnace are three (more or less) similarjets. (Not shown.) If it bedesired to discharge steam through these jets or nozzles, they will beconnected with the pipe j,- but if it be desired to discharge heated airupon the burning fuel they will get the air either from the spacebetween the brick-work, on which the boiler is set, or by means of portsopening into the ash-pit below the grate.

In the bridges/all are. a series of upright pipes, J,which, as shown inFigs. 1 2, and 4, are bent toward the front of the furnace at theirlower ends and open into the ash-pit, the upper ends of said pipes beingalso left open and project up to the top of the bridge-wall.

Upon reference to Figs. l and 2, it will be seen that the pipes Jclosest to each side wall of the furnace are extended upward through themasonry and provided with lateral branches J', which are adapted todischarge heated air horizontally across the top of the bridge-wall. Ifdesired, all the pipes may be connected either with a steam or airsupply; or, as is preferred, part of them will be connected 'with asteam-supply pipe, and the remainder will be adapted to discharge heatedair.

From the above description itwill be seen that the drumming noiseordinarily present in smoke and gas consuming furnaces, due to theintroduction of cold air or steam into the furnace, is by myconstruction entirely obviated, the principal reason being that -the airthat is discharged among the products of combustion is taken from theinterior of the furnace, and is consequently warm.

It is obvious that various'features of my invention may, with veryslight change in their form or arrangement, be adapted for useinloeomot-ives.

Having thus described my invention, what I claim is l. The combination,with a fire pot or cham4 ber, of a bridgewall at the rear end thereof,upright pipes J, provided with lateral branches J adapted to dischargeheated air across the top of the bridge-wall, said pipes J opening attheir lower ends into the ash-pit, all substantially as shown.

2. In a furnace, the combination, with a bridge-wall, of box or chamberF, located therein and provided with disch arge-openings a in its frontface, a series of rocking hollow grate-bars.journaled at their rear endsin the box or chamber F, and a steam-supply pipe adapted to supply steamto said bars at their forward ends.

3. In a furnace, thecombination,with front D, dead-plate H, and abridge-wall, ofa hollow box, F, mounted within the bridge-wall andprovided with discharge-openings a in its front wall, a serie sofrocking hollow grate-bars, G, provided at opposite ends with cylindricaljournals, and a steam supply pipe, j, adapted and arranged,substantially as shown, to discharge steam into the hollow' bars G, asand for the purpose set fort-h.

4. In a furnace, a grate composed of a series of bars, G, made zigzag ontheir adjacent edges and provided on their upper faces with ribs cl, anda strip, u, forming the zigzag edge of each bar and connecting the ribsZ thereof. v5. In a boiler-furnace, a grate eomprisinga series of bars,G, each ribbed on its upper face and made solid on its lower face, andhaving a longitudinal passage, c', and lateral openingsf,

IOO

IIO

communicating with passage e, substantially` as shown,whereby the barsare adapted to receive and discharge steam or air, or both, into andaniong the fuel thereon at the base of the ribs.

6. In combination with the bridge-wall and the hollow chamber Ftherein,the hollow gratebars G, provided with a bulb or enlargement, h,and a steam-supply pipe, j, provided with a nozzle, t', projectingintothe bulb or enlargement 7L, substantially as and for the purpose setforth.

7. In combination with the bridge-wall, the hollow box F, dead-plate H,and steamsup ply pipej, having a nozzle, z', the hollow gratebar G,provided with bulb or enlargement h, and openings t, formed in saidbulbor enlargement, substantially as shown, and for the purpose setforth.

8. In combination with the bridge-wall of a furnace and a box orchamber, F, therein, a dead-plate secured rigidly in position at thefront of the furnace, the hollow grate-bars G, provided with cylindricaljournals e andg,the former inserted into the hollow box F, andsemioireular collars n, encircling the journals g, and bolted orotherwise secured to the under side of the deadplate.

9. In a boiler-fnrnace,the eombination,with

3o a bridgewall having a hollow chamber, F,

therein, of a series of hollow grate-bars journaled at one en d in saidhollow box or chamber,and carried at their other ends by the deadplateand adapted to be rocked or tipped,and a stationary Steamsupply pipeconnected with and adapted to discharge steam into the interior of thehollow bars, substantially as show-n.

l0. In a furnace, the combination, with the dead-plate and the rockinggrate-bars provided with a dependinglug, Z, ofabar, m, connectingthelugsl with one another, and ashaker bar or rod, I, journaled upon theunder face of the dead-plate, connected at its inner end with the bar m,and projecting at its front end through the furnace-front, as and forthepurpose set forth.

11. In a furnaee,a grate comprising a series of bars, G, having on theirupper faces a series of ribs, d, a longitudinal channel or passage,e,eXtending throughout the length of the gratebars, and aseries oflateral openings or passages, f, extending from the chamber or passage e`upward to the base of the ribs el.

In witness whereof I hereunto set` my hand in the presence of twowitnesses.

ROBERT WHELAN.

Vitnesses:

EDWARD DENICOUM, P. J. SCHREINER.

